Mifepristone and misoprostol for medical termination of pregnancy: the effectiveness of a flexible regimen.

Background: Mifepristone, followed 48 hours later by administration of misoprostol, is a well-established regimen for medical termination of pregnancy (TOP). Although this regimen is effective, its inflexibility may limit its provision in an outpatient service.

Objective: To confirm that misoprostol administration is effective whether administered 24, 48 or 72 hours after oral mifepristone.